"""simple docstring"""



import unittest

import numpy as np



def 	_lowerCamelCase(	a   ,    a   ,    a   ,    a = None   ,    ):
       __a       =    np.shape(a				)
       __a       =    np.shape(a				)
       __a       =    np.shape(a				)

       if shape_a[0] != shape_b[0]:
              __a       =    (
                  "Expected the same number of rows for A and B. "
                  F"Instead found A of size {shape_a} and B of size {shape_b}"
              )
              raise ValueError(a				)

       if shape_b[1] != shape_c[1]:
              __a       =    (
                  "Expected the same number of columns for B and C. "
                  F"Instead found B of size {shape_b} and C of size {shape_c}"
              )
              raise ValueError(a				)

       __a       =    pseudo_inv
       if a_inv is None:
              try:
                     __a       =    np.linalg.inv(a				)
              except np.linalg.LinAlgError:
                     raise ValueError(
                         "Input matrix A is not invertible. Cannot compute Schur complement."				)

       return mat_c - mat_b.T @ a_inv @ mat_b






class  snake_case__      (       unittest.TestCase       ):


 def 						a__   ( self						):
        __a       =    np.array([[1, 2, 1], [2, 1, 2], [3, 2, 4]]						)
        __a       =    np.array([[0, 3], [3, 0], [2, 3]]						)
        __a       =    np.array([[2, 1], [6, 3]]						)

        __a       =    schur_complement(lowerCamelCase    ,		lowerCamelCase    ,		lowerCamelCase						)

        __a       =    np.block([[a, b], [b.T, c]]						)

        __a       =    np.linalg.det(lowerCamelCase						)
        __a       =    np.linalg.det(lowerCamelCase						)
        __a       =    np.linalg.det(lowerCamelCase						)

        self.assertAlmostEqual(lowerCamelCase    ,		det_a * det_s						)


 def 						a__   ( self						):
        __a       =    np.array([[1, 2, 1], [2, 1, 2], [3, 2, 4]]						)
        __a       =    np.array([[0, 3], [3, 0], [2, 3]]						)
        __a       =    np.array([[2, 1], [6, 3]]						)

        with self.assertRaises(lowerCamelCase						):
               schur_complement(lowerCamelCase    ,		lowerCamelCase    ,		lowerCamelCase						)






 def 						a__   ( self						):
        __a       =    np.array([[1, 2, 1], [2, 1, 2], [3, 2, 4]]						)
        __a       =    np.array([[0, 3], [3, 0], [2, 3]]						)
        __a       =    np.array([[2, 1, 3], [6, 3, 5]]						)

        with self.assertRaises(lowerCamelCase						):
               schur_complement(lowerCamelCase    ,		lowerCamelCase    ,		lowerCamelCase						)


if __name__ == "__main__":
   import doctest

   doctest.testmod()
   unittest.main()

"""simple docstring"""



def 	_lowerCamelCase(	a				):
       return " ".join(
           "".join(word[::-1]				) if len(a				) > 4 else word for word in sentence.split()				)


if __name__ == "__main__":
   import doctest

   doctest.testmod()
   print(reverse_long_words("""Hey wollef sroirraw"""))
